The MAX154MAX158 are high-speed multi-channel Analog-to-digital converters (ADCs). The MAX154 has four Analog input channels while the MAX158 has eight channels. Conversion time for both devices is 2.5s. The MAX154MAX158 also feature a 2.5V on-chip reference, forming a complete high-speed data acquisition system.Both converters include a built-in track/hold, eliminating the need for an external track/hold. The Analog input range is 0V to +5V, although the ADC operates from a single +5V supply.Microprocessor Interfaces are simplified by the ADC's ability to appear as a memory location or I/O port without the need for external Logic The data outputs use latched, three-state Buffer circuitry to allow direct connection to a Microprocessor data bus or system input port. By Maxim Integrated Products